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A Section approximately at Right Angles to the Long Axis of the Heart

A Section approximately at Right Angles to the Long Axis of the Heart.jpg Red Blood-Corpuscles presenting, some the Surfaces, others the Edges, of their Discs, together with Single Representatives of Four Types of Leucocyte.MiniaturesDigestive system in humansRed Blood-Corpuscles presenting, some the Surfaces, others the Edges, of their Discs, together with Single Representatives of Four Types of Leucocyte.MiniaturesDigestive system in humansRed Blood-Corpuscles presenting, some the Surfaces, others the Edges, of their Discs, together with Single Representatives of Four Types of Leucocyte.MiniaturesDigestive system in humansRed Blood-Corpuscles presenting, some the Surfaces, others the Edges, of their Discs, together with Single Representatives of Four Types of Leucocyte.MiniaturesDigestive system in humansRed Blood-Corpuscles presenting, some the Surfaces, others the Edges, of their Discs, together with Single Representatives of Four Types of Leucocyte.MiniaturesDigestive system in humans

A Section approximately at Right Angles to the Long Axis of the Heart, exposing the Four Valves which lie very nearly in the Same Plane.

The semilunar valve which guards the aperture of the pulmonary artery is the nearest to the breast-bone.